Results 71 to 80 of about 4,266 (203)

Fabrication and electrical characteristics of flash-sintered SiO2-doped ZnO-Bi2O3-MnO2 varistors

Journal of Advanced Ceramics, 2020
The dense ZnO-Bi2O3-MnO2-xSiO2 (ZBMS) varistors for x = 0, 1, 2, 3 wt% were fabricated by flash sintering method under the low temperature of 850 °C within 2 min. The sample temperature was estimated by a black body radiation model in the flash sintering
Pai Peng, Yujun Deng, Jingpeng Niu, Liyi Shi, Yunzhu Mei, Sanming Du, Juan Liu, Dong Xu   +7 more
doaj   +1 more source

Summary of the second workshop on liquid argon time projection chamber research and development in the United States [PDF]

, 2015
The second workshop to discuss the development of liquid argon time projection chambers (LArTPCs) in the United States was held at Fermilab on July 8-9, 2014.
, , , , , , , , , , , , , , , A. Badertscher ., A. Badertscher ., A. Badertscher ., A. Blatter ., A. Ereditato ., A. Hahn, A. Marchionni, B. Baller, B. Baller ., B. Carls, B. Rebel, B.J.P. Jones, B.J.P. Jones ., B.J.P. Jones ., C. Anderson ., C. Bromberg, C. Hagmann, C. Mauger, C. Montanari, C. Thorn, C.G. Wahl, CAPTAIN collaboration, D. Artrip, D. Whittington, D.W. Swan, DarkSide collaboration, F. Bay ., F. Cavanna, G. Deptuch, G. Petrillo, G. Sinins, H. Chen, H. Olling Back, H. Wang, ICARUS collaboration, J. Asaadi, J. Raaf, J. Urheim, K. Lang, K. Terao, L. Epprecht, L.F. Bagby ., LAPPD collaboration, LArIAT collaboration, LBNE collaboration, M. Adamowski, M. Adamowski ., M. Auger ., M. Johnson, M. Nessi, M. Soderberg, M. Stancari, M. Szydagis ., M. Toups, M. Weber, MicroBooNE collaboration, N.J.C. Spooner, NOvA collaboration, R. Acciarri, R. Dharmapalan, R. Van de Water, R. Wasserman, S. Lockwitz, S. Mufson, S. Pordes, T. Briese ., T. Junk, T. Strauss, T. Tope, T. Yang, W. Foreman, WArP collaboration   +86 more
core   +3 more sources

High‐Current Cryogenic DC Solid‐State Circuit Breaker for Electric Aircraft

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
Cryogenic and superconducting technologies have great potential to significantly enhance the power density and efficiency of electric propulsion aircraft. This paper presents the design of a 300 V/1700 A DC solid‐state circuit breaker (SSCB) operating at cryogenic temperatures.
Zhongying Wang, Jiawen Xi, Xianwu Zeng, Emelie Nilsson, Jean‐francois Rouquette, Edwin Calderon, Ravi Kiran Surapaneni, Ludovic Ybanez, Xiaoze Pei   +8 more
wiley   +1 more source

Influence of processing on microstructure and electrical characteristics of multilayer varistors

Journal of Advanced Ceramics, 2019
The paper reports on the influence of processing on microstructure and electrical properties of multilayer varistors based on zinc oxide doped with Bi2O3, Sb2O3, Co2O3, MnO, Cr2O3, B2O3, and SiO2.
D. Szwagierczak, J. Kulawik, A. Skwarek
doaj   +1 more source

Cryogenic DC Circuit Breaker Based on High‐Power Press‐Pack IGBT

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
This paper presents the performance of cryogenically compatible 3.3 kV/1.5 kA PP‐IGBTs as the main circuit breaker in a hybrid circuit breaker. The 3.3 kV/1.5 kA press‐pack IGBT can interrupt currents exceeding 5.1 kA when immersed in a liquid nitrogen bath. PP‐IGBTs are promising candidates for high‐power circuit breakers in cryogenically cooled power
Zhongying Wang, Jiawen Xi, Xianwu Zeng, Stefan Steinhoff, Emelie Nilsson, Jean‐Francois Rouquette, Edwin Calderon, Ravi Kiran Surapaneni, Ludovic Ybanez, Xiaoze Pei   +9 more
wiley   +1 more source

Effect of MnO2${ ext{MnO}}_{2}$ doping on AC aging characteristics of varistor in arrester

International Journal of Ceramic Engineering & Science
As the core component of lightning arrester, the performance of ZnO varistor directly affects the protection level of lightning arrester. Under the action of long‐term AC voltage, the varistors are prone to AC aging, which leads to the deterioration of ...
Zhengzheng Fu, Zongxi Zhang, Songhai Fan, Tao Cui, Donghui Luo, Yiping Jiang, Pengfei Meng, Jingke Guo, Yue Yin   +8 more
doaj   +1 more source

The mathematics of varistors

European Journal of Applied Mathematics, 2016
A three-dimensional model of the varistor device is proposed. The thermal and electric conductivity of the material are taken to depend, in addition to the electric potential, on the temperature. Two theorems of existence and uniqueness of solutions for the boundary-value problem which determine the potential and the temperature inside the device are ...
openaire   +1 more source

Ageing Behaviours and Mechanisms of SiC MOSFET and Si IGBT in DC Solid‐State Circuit Breaker

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
We propose that this distributed thermal profile in IGBT mitigates localised stress. Conversely, the high concentration of thermal stress in SiC MOSFET's gate region leads to its severe ageing. ABSTRACT The rapid development of DC power systems in applications such as electric aircraft and microgrids has highlighted the need for high‐performance DC ...
Jiajia Song, Bo Zhang, Yanfeng Song
wiley   +1 more source

Kinetics deformation of current-voltage characteristics of the varistor oxide structures due to overcharging of the localized states

Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2014
Prolonged exposure of zinc oxide varistors to the electrical load leads to current-voltage characteristics (CVC) deformation, which is associated with a change in the height and width of the intergranular barriers, which are the main structural element ...
A. S. Tonkoshkur, A. V. Ivanchenko
doaj   +1 more source

Stability of microprocessor relay protection and automation systems against intentional destructive electromagnetic impacts. Part 2 [PDF]

, 2011
Problems of impact of the electromagnetic high-power pulses generated at nuclear explosion or by means of the special equipment, intended specially for damage of the electronic equipment, in particular digital protective relays and automatic systems ...
Gurevich, V. I.
core   +3 more sources